Assiot ob



I I. YEOIVIANS.

BORING MACHINE.

APPLICATION FILED 050,12. I918.

l I I Patented July 8, 1919.

l I I I I l L. I. YEOMANS.

BORING MACHINE.

APPLICATION FILED DEC-12.1918.

Patented July 8, 1919.

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L. I. YEOMANS.

BORING MACHINE.

APPLICATION FILED 050.12. 1918.

3 SHEETS- SHJIT 3.

, iat'ulm'd July 8, 1919.

LUCIEN I. YEOMANS, OE QQHECAGQ, ILfiINGIS, AS$IGNOR T0 AMALGAMATED MACHINERY CDRPOBATION, @E @E-IECAGO, ELLE? 015, A GORPQRATIGN 0F DELAWARE.

EGEHG-EEAGHENE.

specification or" Letters ratent.

Patented July 1%, thi h Application filed December 12, 18. Serial Ho.256,408;

To all whom it may concern: 4

Be it known that l, Lucien l. YEoMANs, a citizen of the United States,residing at Chicago, in the county of Cook and State of lllinois, haveinvented a certain new and Improved BoringWlachine, of which thefollowing is a specification.

in a gun-boring machine, the bearings for the head-stock spindle and theboring bar must be accurately alined. The great length of such amachine, however, has made it dirhcult to obtain such alinement. Theobject of the present invention is to provide a machine for use inaccurately babbitting and boring out the various bearings in agun-boring or analogous machine.

in the accompanying drawings, Figure l is a side elevation of a boringmachine embodying my invention. Figs. Qand 3 illustrate portions of thefeeding mechanism. Fig. 'l: is an end elevation. Fig. 5 is a sectionalview taken in the plane of line 55 of Fig. 4.

In the drawings, 3 indicates two parallel finished carriage ways of agun-boring or similar machine. 5 is a combination mandrel and boring barfor use in babbitting and boring the various alined bearings (not shown)of the machine. The means for rotating, advancing and retracting the bar5 comprises a carriage 20 capable of being slidably supported and guidedby the ways 3 and of being lifted off said ways after the bearings havebeen bored. The means for moving the carriage 20 upon the ways 3comprises a screw 21 fixed at one end' to a bracket or cross-piece 22(Fig. 2), said bracket having flanges 28 that overlie the inner portionsof the ways-3. 24. are clamping plates which are clamped to the lowersurfaces of the inner portions of the ways 3 by means of bolts 25. Thescrew 21 is engaged by an internally-threaded sleeve or nut 26 (Fig. 3)which is rotatably mounted in a bearing 27 upon the lower side of thecarriage 20 The sleeve 26 is held against endwise movement with relation to the carriage by means of a llange28 and a nut 29., d

An electric motor 80 mounted upon the rear end of the carriage 20furnishes power for revolving-the bar 5 and the feed-nut 26. fin thearmature shaft of the motor is a pinion 31 that meshes with a gear wheel32 fixed on drive shaft 33 mounted in the carriage 20. The shaft 33carries a clutch 3%, the loose element of which is rigidly connected toa pinion 35. The pinion 35 meshes with a spur gear wheel 36 which isrotatably mounted upon a spindle 3'? extending parallel with the shaft33. Rigid with the spur gear wheel 36 is a pinion 38 that meshes with aspur gear wheel 39 that is loose on the shaft 33. A pinion i0 fixed tothe spur gear wheel 39 meshes with a spur gear wheel ll which is fixedupon the spindle 37. The bar 5 is coupled in any suitable manner to theforward end of the spindle 37.

it will be seen that when the clutch 3-4 is thrown in, power will becommunicated from the motor 30 to the bar 5, through the train ofreduction gears 31, 32, 35, 36, 38, 39, 4 0 and 41.

Means is provided for moving the carriage 20 upon the ways 3 at two diflerent speeds. The means for moving the carriage at low speed comprises apinion i2 fixed upon the spindle 37 and meshing with a pinion 13 mountedupon a stub shaft is in the carriage 20. l ivota-lly mounted upon theshaft i l is a bracket 45 that carries a pinion l6 which meshes with thepinion 43. When the bracket s5 is in the position shown in Fig. i, thepinion 46 meshes with a spur gear wheel at? which is rotatably mountedon the carriage 20. Fixed to the spur gear wheel a? is a pinion 48 whichmeshes'with a spur gear wheel as) that is fixed to the feed nut 26. Ahandle 50 on the bracket 45 provides means for swinging the bracket 4.5to carry the pinion as into and out of mesh with the spur gear wheel47." Any suitable means may be provided for holding the bracket 4-5 inand out of operative position. y

The means for rotating the feed nut 26 at high speed comprises a.sprocket wheel 51 (Fig. i) which 1s looselymounted upon the shaft 33 andis arranged to be connected. thereto by means of a clutch 52. Thesprocket wheel 51 carries a chain 58 which extends to asprocket wheel 5%mounted upon a shaft 55 in the carriage 20. Rigid with the sprocketwheel 54 is a pinion 56 that meshes with the spur gear wheel 41-7.

Means is provided for throwing the clutches 3% and 52 alternately intooperation.

'hand lever 60 is pivoted between its ends to the carriage 20 at 61 andengages a flanged sleeve 62 fixed 0n the shifter rod 57.

' 63 is a latch which is pivoted to the carriage at 64 and adapted tolie in contact with the shifter rod 57 between the'bearings 65 and acollar 66 on the shifter rod.

The operation is as follows:

When the bearings of a gun-boring machine are to be formed, the carriage20 is placed upon the finished ways of the gun' boring machine, and thescrew 20 is secured to said ways by means of the bracket 22,

clamping plates 24 and bolts 25. The bar 5 having been connected to thespindle 37, power is communicated to -the motor 30. When the hand lever60 is in the position shown in full lines in Fig. l, the shaft 33revolves idly, no motion being communicated to the boring bar 5 or tothe feed nut 26. When the lower end of the hand lever 60 is swung to theright, as viewed in Fig. l, the shifter rod 57 is slid to the left,thereby throwing in the clutch 34L, whereupon rotationis imparted to theboring bar 5. if

l the bracket 45 be in the position shown in Fig. 4C, the carriage 20also will be moved toward the work at low speed.

When it is desired to move the carriage 20 in the opposite direction,the bracket 45 is raised to disenga V e the pinion 46 from the spur gearwheel 4 the safety latch 63 is raised clear of the collar 66, and thehand lever is swung in the direction to slide the shifter rod 57' to theright, as viewed in Fig. 1, thereby throwing out the clutch 34- andthrowing in the clutch 52. "The sprocket chain 53 is therebydriven,-thus communicating relatively rapid movement to the feed nut 26and causing the carriage 20 to move away from the work.

The rapid drive may also be employed to advance the carriage rapidly byreversing the direction of rotation of the motor.

When the bearings of the gun-boring machine. have been formed, the feedscrew 21 may be released from the ways 3 the bar 5 disconnected from thespindle 3%, and the carriage 20 lifted off the ways.

necaeec I claim as my invention:

1. A machine for boring 'a bearing of a machine having carriage ways,said firstmentioned machine having, in combination, a carriage adaptedto be slidably supported and guided by said'ways, a carriage-feed screwand a cooperating nut, one of said screw elements being rotatablycarried by the carriage, means for clamping the other of said screwelements to the carriageways, a boring-bar spindlepnthe carriage, and amotor mounted on the carriage and operatively connected to the spindleand the rotatable screw element.

2. A machine for boring a bearing of a machine having two parallelcarriage ways,

i said first mentioned machine having, in combination, 'acarriageadapted to be slidably supported and guided by said ways, a carriage-feeding element on' the carriage, a coacting feeding'elemenn meansfor detachably conhecting said coacting element to the carriage ways ata point forward of the carriage, a drive shaft and a boring-bar spindleon the carriage, a connection between the shaft-and the spindle, a driveconnection between the spindle and the feeding element on thecarriage,-a drive connection between the drive shaft and the lastmentioned feeding element, and a motor mounted on the rear end of thecarriage and operatively connect ed to the drive shaft.

8. A machine for boring a bearing of a machine'having carriage-ways,said first mentioned machine having, in combination, a carnage adaptedto be slidably supported and guided by said ways, a carriagefeeding.element on the carriage, a coacting feeding LUCIQEN I. YEOMANS.

